What is the operating principle of the wiper control system of the multi-function wiper? Wiper control system (wiper control system) through the electronic control system can not only realize the delay control of the wiper, but also other complex controls. The electronic control system includes a two-speed motor and two limit switches. The following functions can be realized through a handle switch: cleaning, wiping, high-speed wiping, low-speed wiping, intermittent wiping and delay control. The complex electronic control system can also realize the positive pressure control of the swing bar and the rainfall sensing control.
The power source of the wiper comes from the electric motor, which is the core of the entire wiper system. The quality requirements of wiper motors are quite high. It uses a DC permanent magnet motor, and the wiper motor installed on the front windshield is generally integrated with the worm gear mechanical part. The function of the worm gear mechanism is to decelerate and increase the torque, and its output shaft drives the four-bar linkage mechanism, through which the continuous rotary motion is changed into a left-right swing motion.
The wiper motor adopts a 3-brush structure to facilitate speed change. The intermittent time is controlled by an intermittent relay, and the charge and discharge functions of the return switch contact of the motor and the resistance and capacitance of the relay are used to make the wiper wipe according to a certain period. The wiper blade rubber strip is a tool to directly remove rain and dirt on the glass. The wiper strip is pressed against the glass surface by the spring strip, and its lip must match the angle of the glass in order to achieve the required performance.
Under normal circumstances, there is a wiper control knob on the handle of the automobile combination switch, with 3 gears of low speed, high speed and intermittent. At the top of the handle is a washer button switch. When the switch is pressed, washing water is sprayed, and the windshield is washed with the wiper. The scrubber system is a very common device on the car. It consists of a water storage tank, a water pump, a water delivery pipe, and a water spray nozzle. The water storage tank is generally a plastic tank of 1.5 liters to 2 liters. The water pump is a miniature electric centrifugal pump. The washing water is divided into small jets and sprayed to the windshield, which cooperates with the wiper to clean the windshield.